基于高光谱数据的滴灌甜菜叶片全氮含量估算

李宗飞,苏继霞,费聪,李阳阳,刘宁宁,戴宇祥,张开祥,王开勇,樊华,陈兵

Estimation of total nitrogen content in sugarbeet leaves under drip irrigation based on hyperspectral characteristic parameters and vegetation index

Zong-Fei LI,Ji-Xia SU,Cong FEI,Yang-Yang LI,Ning-Ning LIU,Yu-Xiang DAI,Kai-Xiang ZHANG,Kai-Yong WANG,Hua FAN,Bing CHEN

图1 不同氮素水平下高光谱反射率与红边 N0: 施氮0 kg hm-2; N75: 施氮75 kg hm-2; N150: 施氮150 kg hm-2; N225: 施氮225 kg hm-2。

Fig. 1 Canopy hyperspectral reflectance and red edge at different nitrogen levels N0: nitrogen application of 0 kg hm-2; N75: nitrogen application of 75 kg hm-2; N150: nitrogen application of 150 kg hm-2; N225: nitrogen application of 225 kg hm-2.